1. Fuks, I. M., "Asymptotic solutions for backscattering by smooth 2d surfaces," Progress In Electromagnetics Research, Vol. 53, 189-226, 2005.
doi:10.2528/PIER04092102
2. Martinez, D., F. Las-Heras, and R. G. Ayestaran, "Fast methods for evaluating the electric field level in 2D-indoor enviroments," Progress In Electromagnetics Research, Vol. 69, 247-255, 2007.
doi:10.2528/PIER06122105
3. Kravtsov, Y. A., "Two new asymptotic methods in the theory of wave propagation in inhomogeneous media (review)," Sov. Phys. Acoust., Vol. 14, No. 1, 1-17, 1968.
4. Ziolkowski, R. W. and G. A. Deschamps, "Asymptotic evaluation of high-frequency field near a caustic: An interpretation to Maslov's method," Radio Science, Vol. 19, 1005-1025, 1984.
5. Chapman, C. H. and Drummond, "Body wave seismograms in inhomogeneous media using Maslov asymptotic theory," Bull Seismol. Cos. Am., Vol. 72, 277-317, 1984.
6. Gorman, A. D., "Vector field near caustics," J. Math. Phys., Vol. 26, 1404-1407, 1985.
doi:10.1063/1.526954
7. Hongo, K. and Y. Ji, "Highfrequency expression for the field in the caustic region of a reflector using Maslov's method," Radio Science, Vol. 21, 911-919, 1986.
8. Hongo, K. and Y. Ji, "High frequency expression for the field in the caustic region of a cylindrical reflector using Maslov's method," Radio Science, Vol. 22, 357-366, 1987.
9. Hongo, K. and Y. Ji, "Study of the field around the focal region of spherical reflector antenna," IEEE Trans. on Antenna and Propagation, Vol. 36, 592-598, 1988.
doi:10.1109/8.192134
10. Ji, Y. and K. Hongo, "Analysis of electromagnetic wave refracted by a spherical dielectric interface," J. Opt. Soc. Am., Vol. 8, 541-548, 1991.
11. Ji, Y. and K. Hongo, "The field in the focal region of dielectric sphere lens," J. Opt. Soc. Am., Vol. 8, 1721-1729, 1991.
12. Hongo, K. and H. Kobayashi, "Radiation characteristics of a plano-convex lens antenna," Radio Science, Vol. 31, 1025-1035, 1996.
doi:10.1029/96RS01330
13. Aziz, A., Q. A. Naqvi, and K. Hongo, "Analysis of the fields in two dimensional Cassegrain System," Progress In Electromagnetics Research, Vol. 71, 227-241, 2007.
doi:10.2528/PIER07022001
14. Ghaffar, A., Q. A. Naqvi, and K. Hongo, "Analysis of the fields in three dimensional Cassegrain System," Progress In Electromagnetics Research, Vol. 72, 215-240, 2007.
doi:10.2528/PIER07031602
15. Nishi, H., H. Ichikawa, M. Toyama, and I. Kitano, "Graded-index objective lens for compact disk system," Applied Optics, Vol. 25, 1986.